Cabletron Systems NB30 manuale d’uso

Title Page NB30 User’ s Guide[...]

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i Notice Cabletron Systems r eserves the right to make changes in speciÞcations and other information contained in this document without prior notice. The reader should in all cases consult Cabletr on Systems to determine whether any such changes have been made. The hardwar e, Þrmware, or softwar e described in this manual is subject to change wi[...]

ii AppleT alk, Apple, Macintosh, and T okenT alk are r egistered trademarks; and Apple Remote Access and EtherT alk are trademarks of Apple Computer , Inc. SmartBoost is a trademark of American Power Conversion ST is a register ed trademark and C++ is a trademark of A T&T Banyan and VINES are r egistered trademarks of Banyan Systems, Inc. cisco[...]

iii ANNEX, ANNEX-II, ANNEX-IIe, ANNEX-3, ANNEX-802.5, MICRO-ANNEX-XL, and MICRO- ANNEX-ELS are trademarks of Xylogics, Inc. MAXserver and Xyplex are trademarks of Xyplex, Inc. Restricted Rights Notice (Applicable to licenses to the United States Government only .) 1. Use, duplication, or disclosure by the Government is subject to r estrictions as s[...]

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v Contents Chapter 1 Intr oduction Using the NB-30 Bridge User Õs Guide ....................................................................... 1-1 Related Manuals ............................................................................................................ 1-2 Software Conventions ...................................................[...]

Contents vi Ethernet and Remote Port Packet Discarded Statistics ........................... 3-17 Bridge Spanning T ree.................................................................................................. 3-17 Bridge Level Parameters ..................................................................................... 3-19 Bridge Port [...]

1-1 Chapter 1 Intr oduction How to use this guide; related guides; software con ventions; getting help; NB-30 Br idge firmware v ersion W elcome to the SPECTRUM Element Manager for the NB-30 User Õs Guide. We have designed this guide to serve as a simple refer ence for using SPECTRUM Element Manager for the NB-30 Bridge. The NB-30 series bridge i[...]

Introduction 1-2 Related Manuals Chapter 1, Introduction , provides a list of r elated documentation, describes certain software conventions, and shows you how to contact Cabletr on Systems T echnical Support. Chapter 2, The NB-30 Bridge Chassis V iew , describes the visual display of the NB-30 Bridge and explains how to use the mouse within the Ch[...]

Software Con v entions 1-3 Introduction Software Con ventions SPECTRUM Element Manager Õs device user interface contains a number of elements which are common to most windows and which operate the same regar dless of which window they appear in. A brief description of some of the most common elements appears below; note that the information provid[...]

Introduction 1-4 Softw are Conv entions ¥ Double-clicking means to position the mouse pointer over the indicated target, then pr ess and release the mouse button two times in rapid succession. This is commonly used to activate an objectÕs default operation, such as opening a window from an icon. Note that ther e is a distinction made between Òcl[...]

Software Con v entions 1-5 Introduction IP Address Displays the deviceÕs IP (Internet Pr otocol) Address; this will be the IP address used to deÞne the device icon. IP addr esses are assigned via Local Management for the NB-30; they cannot be changed via SPECTRUM Element Manager . MA C Address Displays the manufacturer -set MAC address of the por[...]

Introduction 1-6 Getting Help Getting Help This section describes differ ent methods of getting help for questions or concerns you may have while using SPECTRUM Element Manager . Using On-line Help Y ou can use the NB-30 Bridge window Help buttons to obtain information speciÞc to the device. When you click on a Help button, a window will appear wh[...]

NB-30 Bridge Fir mware 1-7 Introduction Getting Help fr om the Cabletr on Systems Global Call Center If you need technical support related to SPECTRUM Element Manager , or if you have any questions, comments, or suggestions related to this manual or any of our products, please feel fr ee to contact the Cabletron Systems Global Call Center via one o[...]

Introduction 1-8 NB-30 Br idge Firmware[...]

2-1 Chapter 2 The NB-30 Bridg e Chassis Vie w Inf or mation displa yed in the Chassis View window; the logical chassis view; the Chassis Manager window; bridge management functions The NB-30 Bridge Chassis V iew window is the main screen that immediately informs you of the current condition of individual ports on your bridge via a graphical display[...]

The NB-30 Bridge Chassis View 2-2 Viewing Chassis Inf or mation Vie wing Chassis Inf ormation The NB-30 Bridge Chassis V iew window ( Figure 2-2 ) pr ovides a graphic repr esentation of the NB-30 Bridge, including a color-coded port display which immediately informs you of the current status of bridging at each port. Figure 2-2. NB-30 Bridge Chassi[...]

Viewing Chassis Inf or mation 2-3 The NB-30 Bridge Chassis View Fr ont P anel Inf ormation The areas surr ounding the main port display area pr ovide the following device information: IP The Internet Protocol addr ess assigned to the NB-30 appears in the title bar of the Chassis V iew window; this will display the IP addr ess you have used to creat[...]

The NB-30 Bridge Chassis View 2-4 Viewing Chassis Inf or mation Date The current date, in an mm/dd/yyyy format, set in the NB-30 BridgeÕs internal clock. Menu Structure By clicking on various areas of the NB-30 Bridge Chassis V iew display , you can access menus with device- and port-level options, as well as utility applications which apply to th[...]

Viewing Chassis Inf or mation 2-5 The NB-30 Bridge Chassis View The Device Men u From the Device Menu at the Chassis V iew window menu bar , you can access the following selections: ¥ Device T ype... , which displays a window containing a description of the device being modeled: NB-30 - Remote Bridge. ¥ System Group... , which allows you to manag[...]

The NB-30 Bridge Chassis View 2-6 Viewing Chassis Inf or mation The NB-30 Bridge P or t Status Display Each port display on the NB-30 will indicate that portÕs current bridging state: FWD (Forwarding) (Green) The port is on line and forwar ding packets across the NB-30 from one network segment to another . DIS (Disabled) (Blue) Bridging at the por[...]

Managing the Bridge 2-7 The NB-30 Bridge Chassis View Figure 2-4. Chassis Manager W indow Viewing Har dware T ypes In addition to the graphical displays described above, choosing the Device T ype option on the Device menu brings up a window that describes the management device being modeled: Figure 2-5. Device T ype W indow Managing the Bridge In a[...]

The NB-30 Bridge Chassis View 2-8 Managing the Bridge Setting the Device Date and Time The Device menu pr ovides access to two methods for changing the date and time stored in the deviceÕs internal clock: you can select the Edit Device T ime and Edit Device Date options from the menu itself, or you can use the I-bar cursor at the appropriate Þeld[...]

Managing the Bridge 2-9 The NB-30 Bridge Chassis View 2. Enter the new date in an mm/dd/yyyy f or mat, either by highlighting the field you wish to change and using the up and do wn arrow b uttons, or b y simply entering the new v alue in the appropriate field. 3. Click on OK to sa ve the changes, or on Cancel to e xit without changes. Enabling a[...]

The NB-30 Bridge Chassis View 2-10 Managing the Bridge[...]

3-1 Chapter 3 NB-30 Bridging Bridge management ov er view; viewing and managing bridging interf aces; using the Bridge Status window; viewing bridge statistics; using Spanning T ree; using the Filtering Database; Restoring br idge def aults; Resetting br idge def aults; Restar ting the br idge. Bridging Basics Bridges are used in local ar ea networ[...]

NB-30 Bridging 3-2 Bridging Basics About T ransparent Bridging T ransparent bridges ar e most common in Ethernet networks. Individual T ransparent bridges monitor packet traf Þc on attached network segments to learn where end stations r eside in relation to each segment by mapping the Sour ce Address of each r eceived frame to the port (and segmen[...]

Bridge Status 3-3 NB-30 Bridging ¥ The Spanning T ree window shows bridge port information and pr otocol parameters relating to the Spanning T r ee AlgorithmÑthe method of determining the controlling bridge when a series of bridges ar e placed in parallel (see Bridge Spanning T ree , page 3-17 ). ¥ W ith the Filtering Database window , you can s[...]

NB-30 Bridging 3-4 Bridge Status Figure 3-1. The NB-30 Bridge Status W indow The following information is provided by the Bridge Status window for the NB-30 and for each individual bridging interface. Up Time At the top of the Bridge Status window , you can see the time period (in a days, hh:mm:ss format) that has elapsed since the NB-30 was last r[...]

Bridge Status 3-5 NB-30 Bridging Bridge State on Interface This color-coded text box indicates the state of bridging over the port interface. Note that this state (and its corresponding color code) will also be r eßected on the NB-20E/25E Port display in the Chassis V iew window . Possible bridge states and their corresponding colors ar e: FWD (Fo[...]

NB-30 Bridging 3-6 Bridge Status Bridge Status on Remote P or t Interface This color-coded text box indicates the operating status of the r emote port. Possible status conditions are: ¥ LINK OK/DCE READY (gr een) Ñ Indicates that communication between the remote port and the data cir cuit-terminating equipment (DCE) is established and ready to tr[...]

Bridge Status 3-7 NB-30 Bridging ¥ NO EXT CLOCK (blue) Ñ Indicates that the remote port is not r eceiving a clock signal from the DCE. Interface Name This settable information Þeld allows you to enter a name for the bridgeÕs active local port and its remote port. The default name for the bridgeÕs two network interfaces are ETHERNET POR T and R[...]

NB-30 Bridging 3-8 Enabling and Disab ling Br idging Accessing Bridge Status Windo w Options At the top of the Bridge Status window , you can click on Bridge to access a menu that provides other bridge management options: ¥ The Spanning T ree window , which allows you to set the Spanning T r ee Algorithm parameters for bridging on your NB-30 (see [...]

Bridge Statistics 3-9 NB-30 Bridging Y ou can also disable bridging across all ports or on your NB-30 fr om the Chassis V iew window . T o disable bridging at the device level from the Chassis V iew window: 1. Click on the Boar d Index (1) in the front panel display . A menu will appear . 2. Click on Enab le Bridge to restar t br idging at the de v[...]

NB-30 Bridging 3-10 Bridge Statistics To access the NB-30 port Bridge Performance Graph window: 1. F rom the Br idge Status window , click on the appropriate port button ( Ethernet or Remote ). The P or t menu will appear . 2. Click on P erformance Graph... . The NB-30 por t Br idge P erformance Graph window will appear . Figure 3-2. Bridge Perform[...]

Bridge Statistics 3-11 NB-30 Bridging Device Err ors The total number of frames (either inbound or outbound) containing errors which prevented them fr om being processed by the bridgeÕs interfaces. Nothing The selected scale is not currently in use. For the port level window , you can choose from among the following display options. Note that some[...]

NB-30 Bridging 3-12 Bridge Statistics Out of Window Coll. (Ethernet Port Only) The number of collisions at this port that were out of the standar d collision window (51.2µs) due to a network problem experienced by the bridge. The problem may be that the network length exceeds speciÞcations, or that a node is transmitting without listening for car[...]

Bridge Statistics 3-13 NB-30 Bridging 2. Click on the desired fr ames mode: F or the Bridge P erformance Graph, the options are Frames Forwar ded , Frames Received , Frames Filtered , Device Err ors , or Nothing . F or the Ether net P or t P erf ormance Graph, the options are Frames Received , Discarded Inbound , Forwar ded Outbound , Lack of Buffe[...]

NB-30 Bridging 3-14 Bridge Statistics The following color-coded Þelds appear in the Bridge Summary Statistics window . The Þrst four statistics Þelds are also r epresented visually by a color-coded pie chart (gr een = forwarded packets, blue = Þlter ed packets, red = err or packets, magenta = other packets). P ackets Forwar ded (Green) The numb[...]

Bridge Statistics 3-15 NB-30 Bridging Figure 3-4. Ethernet Port Statistics W indow T o access the remote port Statistics window: 1. Click on Remote to re veal the P or t menu. 2. Choose Statistics... . The follo wing window , Figure 3-5 , will appear . Figure 3-5. Remote Port Statistics W indow[...]

NB-30 Bridging 3-16 Bridge Statistics P or t Pac ket Statistics The following statistics Þelds appear in the Ethernet and Remote Port Statistics windows under the heading ÒPackets.Ó These are also graphically displayed in the pie chart (with the exception of Packets Received). Note that the Remote Port Statistics window does not recor d Packets [...]

Bridge Spanning T ree 3-17 NB-30 Bridging CRC The total number of frames received by the port that had Cyclical Redundancy Check (CRC) errors. Framing The number of frames received by the port fr om the network that were misaligned Ñ that is, in which a byte of data in the packet contained less than 8 bits. Giants The number of frames that were r [...]

NB-30 Bridging 3-18 Bridge Spanning T ree In T ransparent bridging, Spanning T r ee must be used to prevent data loops (since in an Ethernet environment, a packet pr opagated down multiple paths would cause higher volumes of trafÞc and collisions that would cripple a network that relied on carrier sense and collision detection). In a network desig[...]

Bridge Spanning T ree 3-19 NB-30 Bridging Bridge Level P arameters Bridge Priority This Þeld displays the ÒpriorityÓ component of the NB-30Õs unique bridge identiÞer . The Spanning T ree Algorithm assigns each bridge a unique identiÞer , which is derived from the bridgeÕs MAC addr ess and the Priority . The bridge with the lowest value of br[...]

NB-30 Bridging 3-20 Bridge Spanning T ree Protocol Displays the Spanning T ree Algorithm Protocol type the NB-30 is currently using. The choices are: ¥ 802.1 ¥ DEC (DEC Lanbridge 100) ¥ None The following four Þelds display values used for various Spanning T ree timers that are set at the Root Bridge and this bridge. In Spanning T r ee operatio[...]

Bridge Spanning T ree 3-21 NB-30 Bridging Bridge P or t Level P arameters The following Þelds are applicable to each bridge port on the NB-30. Priority If two or more ports on the same bridge ar e connected to the same LAN segment, they will receive the same Root ID/Root Cost/Bridge ID information in ConÞguration BPDUs received at each port. In t[...]

NB-30 Bridging 3-22 Bridge Spanning T ree T opology This indicates how many times the bridgeÕs T opology Change ßag has been changed since the NB-30 was last powered-up or initialized. The T opology Change ßag increments each time a bridge enters or leaves the network, or when the Root Bridge ID changes. The Þeld also indicates the date and tim[...]

Bridge Spanning T ree 3-23 NB-30 Bridging Changing Hello Time If the bridge is the Root Bridge, or is attempting to become the Root, and you want to change the length of time the bridge waits between sending conÞguration BPDUs: 1. Highlight the Hello Time field, and type in a new v alue. 2. Click on Set . The IEEE 802.1d speciÞcation recommends [...]

NB-30 Bridging 3-24 Filtering Database Changing P or t Priority T o change the part of the Port Priority used in priority comparisons: 1. Highlight the por t Priority field f or the desired por t, and enter the new priority identifier . Only valid he xadecimal numbers (0 to FF) are allo wed in this field. The def ault is 80 hexadecimal. 2. Click[...]

Filtering Database 3-25 NB-30 Bridging Entries to the Source Address T able are one of four types: Permanent , Static , Dynamic , or Learned . ¥ Permanent entries are addr esses that you add to the Static Database (via the Filtering Database window) that are stor ed in the deviceÕs battery-backed RAM. Since they remain in the device on shutdown o[...]

NB-30 Bridging 3-26 Filtering Database Figure 3-7. The Filtering Database W indow The following Þelds are listed in the top portion of the Filtering Database window . T ype Indicates the type of entry in the database: Static, Dynamic, or Permanent. Number Displays the current number of Static, Dynamic, and Permanent addr ess entries. Capacity Indi[...]

Filtering Database 3-27 NB-30 Bridging The following Þelds are applicable to the scr ollable Address Entry panel of Filtering Database entries. List The List checkboxes at the bottom of the window indicate whether the associated entry type (Dynamic, Static, or Permanent) will be displayed in the scrollable table of address entries. A check next to[...]

NB-30 Bridging 3-28 Filtering Database Changing the T ype of Entry Y ou can change the type of any entry in the Þltering database to be a Static or Permanent entry . T o do so: 1. Click on the shado wed T ype button. A menu will appear with the three possible types to which the entry can be changed. Dynamic entries can be changed to P er manent or[...]

DSX-1 Summar y 3-29 NB-30 Bridging T o delete an address: 1. Click to highlight the address entry in the Address Entr y panel that you wish to delete from the filtering database. 2. Click on Delete . Erasing Entries from the P ermanent or Acquired Databases Y ou can erase the entire Acquir ed or Permanent Databases (not including the 17 multicast [...]

NB-30 Bridging 3-30 DSX-1 Summar y Figure 3-9. Bridge DSX-1 Summary W indow Configuring, Running, and Checking the Loopbac k T est T o conÞgure and run the loopback test: 1. Click on T est P attern . A menu will appear . 2. Click to select the appropriate data pattern option to be used in the loopback test: Alternating 1/0s All 1s All 0s Incremen[...]

Restoring Br idge Def aults 3-31 NB-30 Bridging T o halt a test in progr ess and return to the Bridge Status window , click on Cancel . The results of the test will be displayed in the status Þeld next to the test button: ¥ Not in Loopback Ñ Indicates that the DSX-1 port is currently in normal operating condition; a loopback test is not being pe[...]

NB-30 Bridging 3-32 Resetting Bridge Counters ¥ All Spanning T ree Algorithm information screens back to their default values. Y ou must also restart the bridge for the new Spanning T r ee information to take effect. ¥ Ageing T ime on Filtering Database Screen back to 300 seconds ¥ DSX-1 T est Pattern to Alternate 1/0s ¥ DSX-1 Channel Assignmen[...]

Restar ting the Bridge 3-33 NB-30 Bridging[...]

NB-30 Bridging 3-34 Restarting the Br idge[...]

Inde x-1 Index A Acquired Database erasing 3-29 Address 3-27 Ageing T ime 3-26, 3-27 B BLK (Blocking) 2-6, 3-5 Board Menus 2-5 Boot Prom, r evision 2-3 Bridge Location 3-4 Port Address - Local Ethernet Port 3-7 Priority 3-19, 3-22 Protocol Data Units (BPDUs) 3-2, 3-18 Spanning Tree changing parameters 3-22 State on Ethernet Interface 3-5 State on I[...]

Inde x Inde x-2 Frame Alignments 3-12 Frames Filtered 3-10 Forwarded 3-10 Received 3-10, 3-11 FWD (Forwarding) 2-6, 3-5 G Getting Help 1-6 Giant Packets 3-12 Global Call Center 1-7 H Hello T ime 3-20, 3-23 Help button 1-5, 1-6 Help Menu 2-5 Hold T ime 3-20 I Interface Name 3-7 Interface T ype 3-7 IP addr ess 1-5, 2-3 L Lack of Buffer Space 3-11 Lea[...]

Inde x-3 Inde x Protocol 3-20 R related documents 1-2 REM LOOP/LINK LOST 3-6 REM LOOP/LINK OK 3-6 REM LOOP/RED ALARM 3-6 REM LOOP/YELLOW ALARM 3-6 Reset Counters 3-32 Restart Bridge 3-32 Restore Defaults 3-31 Root Bridge 3-18, 3-19 selection process 3-18 Cost 3-19 Port 3-19 Priority 3-19 S Segment Name 3-7 Set button 1-5 Source Addr ess T able 3-24[...]

Inde x Inde x-4[...]